Exchange: Message Could not be Processed..

We're running Exchange v5.0, sp2.  We've had a few messages recently from external sources that hit our users' mailboxes reporting this error:

The Microsoft Exchange Server received an Internet message that could not be processed. To view the original message content, open the attached message.

What I'm suspecting is that the newer versions of Netscape (that the sender is using) have a new MIME encoding that our older Exchange Server is not able to interpret..  Any clues would be greatly appreciated.

From within the attached message, here is the RAW SMTP header;

Received: from mail.cyberus.ca by torrlpexc.royallepage.com with SMTP (Microsoft Exchange Internet Mail Service Version 5.0.1460.8)
      id XGXZN31V; Thu, 9 Dec 1999 17:36:58 -0500
Received: from cyberus.ca (ip86.ts17-1.mn.dialup.ottawa.cyberus.ca [209.195.66.86])
      by cyberus.ca (8.9.3/8.9.3/Cyberus Online Inc.) with ESMTP id RAA25593;
      Thu, 9 Dec 1999 17:22:25 -0500 (EST)
Message-ID: <38502B74.3BB69EA0@cyberus.ca>
Disposition-Notification-To: Murray Mosher <mmosher@cyberus.ca>
Date: Thu, 09 Dec 1999 17:21:40 -0500
From: Murray Mosher <mmosher@cyberus.ca>
X-Mailer: Mozilla 4.7 [en] (Win98; I)
X-Accept-Language: en
MIME-Version: 1.0
To: nho@royallepage.com, tguty@royallepage.com
Subject: Aerials for Nathan
Content-Type: multipart/mixed;
 boundary="------------9FA712752FD00EBB87B82CC3"

This is a multi-part message in MIME format.
--------------9FA712752FD00EBB87B82CC3
Content-Type: text/plain; charset=x-user-defined
Content-Transfer-Encoding: 7bit

Nicky: Images 4&5.
Murray
--------------9FA712752FD00EBB87B82CC3
Content-Type: image/jpeg;
 name="7h1_0a34.jpg"
Content-Transfer-Encoding: base64
Content-Disposition: inline;
 filename="7h1_0a34.jpg"

<snip..>
LVL 7
scdavisAsked:
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LermitteConnect With a Mentor Commented:
For exchange you have SP3 :-)

Mario
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LermitteCommented:
Read this tree KB articles:

Q164662, Q169891 & Q175580.

Mario
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Handy HolderSaggar maker's bottom knockerCommented:
header looks good, Mario is right you need later s.pack
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scdavisAuthor Commented:
Funny.  We're running 5.0/sp2, which seems to be the latest available.  I will try re-applying it, but this seems to have been a freak occurance.  

I managed to decode the MIME'd documents with some little utility - which makes me suspicious of the IMC though.  Little util was called 'fastcode32 v3.5' - quite a nice little decoder.

Microsoft seems to have some post-sp2 IMC fixes, but the KB articles don't relate really to any decoding issues such as this one.

Thanks for the input, Gents - Mario, please post an answer, if you'd like to claim the points..

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LermitteCommented:
Install SP3 this will maybee helping you out. Im sorry but I have the SP3 not here, im home now...But there will be somewhere a readme file on the Microsoft website.

http://www.microsoft.com/exchange

Mario
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scdavisAuthor Commented:
Perhaps I'll just upgrade to Exchange 5.5 from 5.0 so's I can install that service pack.  <grin>

Cheers,
Scott.

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LermitteCommented:
Wait till 2 januari and say then that you need SP3 for Y2K complaince...

Mario
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